malignant epithelial tumor of ovary (MONDO_0018364, a Monarch Disease Ontology identifier) is an invasive malignant tumor that originates from the surface epithelium of the ovary. It is composed of malignant epithelial cells and stroma. Representative examples include serous adenocarcinoma, mucinous adenocarcinoma, endometrioid adenocarcinoma, clear cell adenocarcinoma, and malignant Brenner tumor. Also known as: epithelial cancer of ovary, malignant ovarian epithelial tumor, malignant ovarian epithelial tumour, malignant ovarian surface epithelial-stromal neoplasm, malignant ovarian surface epithelial-stromal tumor, malignant ovarian surface epithelial-stromal tumour, ovarian epithelial cancer, ovarian epithelial tumor, malignant.